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모재의 방향성에 따른 마찰교반용접 판재의 성형성에 관한 실험적 연구
김대용(Daeyong Kim),이원오(Wonoh Lee),김준형(Junehyung Kim),Chongmin Kim,정관수(Kwansoo Chung) 한국소성·가공학회 2009 소성가공 : 한국소성가공학회지 Vol.18 No.1
In order to investigate the formability of friction stir welded(FSW) tailor welded blanks(TWB) with respect to the base material’s directional combination, aluminum alloy AA6111-T4 sheets were welded with three different conjoining types: RD-RD, TD-RD and TD-TD. Here, RD and TD represent rolling and transverse directions, respectively. For experimental formability study, three tests with gradual complexity were performed: the simple tension test with various weld line directions for uni-axial elongation, the hemisphere dome stretching test for biaxial stretching and the cylindrical cup deep drawing test. As a result, all three forming tests showed that RD-RD type samples exhibited the best formability, while TD-TD type sheets showed the least formability performance.